[FORUM] After change the font, bold is without effect

A weird thing, it's definitive not a browser preference. And also with Edge and IE I have the same behaviour.

Without a font name it works (with blabla) ... and I can change the font itself too. But chaning font AND bold does not work HERE.

And last but not least, I tried the same code in another forum (not the same forum software probably but nevertheless) and there it works.

Maybe it's OS or resolution related??

OS here: Win 10 Pro x64, Build 16299.214, Version 1709